Platinum‐Gold Alloy Catalyzes the Aerobic Oxidation of Formic Acid for Hydrogen Peroxide Synthesis. (25th October 2022)

• Record Type: Journal Article
• Authors: Chen, Jinxing; Ma, Qian; Yu, Zhixuan; Li, Minghua; Dong, Shaojun
• Is Part Of: Angewandte Chemie. Volume 134:Number 48(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-10-25
• Subjects: Enzyme Mimic -- Formic Acid Oxidation -- Hydrogen Peroxide; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202213930
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: On‐site hydrogen peroxide production through electrocatalytic and photocatalytic oxygen reduction reactions has recently attracted broad research interest. However, practical applications have thus far been plagued by the low activity and the requirement of complex equipment. Here, inspired by the process of biological hydrogen peroxide synthesis catalyzed by enzymes, we report a Pt‐Au alloy to mimic the catalytic function of natural formate oxidase for hydrogen peroxide synthesis through aerobic oxidation of formic acid. The mass activity of the Pt‐Au alloy is three times higher than that of formate oxidase. Density functional theory calculations revealed that the efficient dehydrogenation of formic acid and the high selectivity of the subsequent reduction of oxygen to hydrogen peroxide account for the high hydrogen peroxide productivity. In addition, the formic acid aqueous solution provides an acidic environment, which is conducive to the utilization of the in situ generated hydrogen peroxide for oxidation reactions, including C−H bond oxidation and sterilization. Abstract : Inspired by the catalytic mechanism of formate oxidase, a platinum‐gold alloy simulating the catalytic function of formic acid oxidase was designed. Hydrogen peroxide can be directly synthesized by aerobic oxidation of formic acid without complex equipment and an additional energy supply.